Though the producers did not know about the cancellation until recently, they had an inkling this might be coming, sources say. So the final episode therefore feels like a suitable finale, with topics addressed like Juliet (Maggie Lawson) and Shawn's (James Roday) relationship.

"Psych" is one of the rare cable dramas to surpass 100 episodes. Its legacy includes a two-hour musical, a 10-city college tour and five appearances at Comic-Con.

"Psych has made an indelible imprint on the television landscape, with a unique brand of comedy," said Chris McCumber, president of USA Network. "The final season celebrates the iconic characters that have made this show so beloved, and will be an exclamation point on the series' incredible run. And while the series will wrap in March somehow I don't believe we've heard the last of Shawn and Gus."

In 2013, "Psych" averaged 4.2 million viewers. Below is a message from stars James Roday and Dule Hill about the final season: